package com.mapbox.mapboxandroiddemo.examples.dds;

import android.graphics.Color;
import android.os.Bundle;

import com.mapbox.mapboxandroiddemo.R;
import com.mapbox.mapboxsdk.Mapbox;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
import com.mapbox.mapboxsdk.maps.Style;
import com.mapbox.mapboxsdk.style.expressions.Expression;
import com.mapbox.mapboxsdk.style.layers.CircleLayer;
import com.mapbox.mapboxsdk.style.sources.GeoJsonOptions;
import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;

import java.net.URI;
import java.net.URISyntaxException;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import timber.log.Timber;

import static com.mapbox.mapboxsdk.style.expressions.Expression.get;
import static com.mapbox.mapboxsdk.style.expressions.Expression.literal;
import static com.mapbox.mapboxsdk.style.expressions.Expression.toNumber;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleBlur;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleColor;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleRadius;

/**
 * Use Mapbox GL clustering to visualize point data as hotspots.
 */
public class CreateHotspotsActivity extends AppCompatActivity {

  private MapView mapView;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Mapbox access token is configured here. This needs to be called either in your application
    // object or in the same activity which contains the mapview.
    Mapbox.getInstance(this, getString(R.string.access_token));

    // This contains the MapView in XML and needs to be called after the access token is configured.
    setContentView(R.layout.activity_style_create_hotspots_points);

    mapView = findViewById(R.id.mapView);
    mapView.onCreate(savedInstanceState);
    mapView.getMapAsync(new OnMapReadyCallback() {
      @Override
      public void onMapReady(@NonNull final MapboxMap mapboxMap) {
        mapboxMap.setStyle(Style.DARK, new Style.OnStyleLoaded() {
          @Override
          public void onStyleLoaded(@NonNull Style style) {
            addClusteredGeoJsonSource(style);
          }
        });
      }
    });
  }

  private void addClusteredGeoJsonSource(@NonNull Style loadedMapStyle) {

    // Add a new source from our GeoJSON data and set the 'cluster' option to true.
    try {
      loadedMapStyle.addSource(
        // Point to GeoJSON data. This example visualizes all M1.0+ earthquakes from
        // 12/22/15 to 1/21/16 as logged by USGS' Earthquake hazards program.
        new GeoJsonSource("earthquakes",
          new URI("https://www.mapbox.com/mapbox-gl-js/assets/earthquakes.geojson"),
          new GeoJsonOptions()
            .withCluster(true)
            .withClusterMaxZoom(15) // Max zoom to cluster points on
            .withClusterRadius(20) // Use small cluster radius for the hotspots look
        )
      );
    } catch (URISyntaxException uriSyntaxException) {
      Timber.e("Check the URL %s", uriSyntaxException.getMessage());
    }

    // Use the earthquakes source to create four layers:
    // three for each cluster category, and one for unclustered points

    // Each point range gets a different fill color.
    final int[][] layers = new int[][] {
      new int[] {150, Color.parseColor("#E55E5E")},
      new int[] {20, Color.parseColor("#F9886C")},
      new int[] {0, Color.parseColor("#FBB03B")}
    };

    CircleLayer unclustered = new CircleLayer("unclustered-points", "earthquakes");
    unclustered.setProperties(
      circleColor(Color.parseColor("#FBB03B")),
      circleRadius(20f),
      circleBlur(1f));
    unclustered.setFilter(Expression.neq(get("cluster"), literal(true)));
    loadedMapStyle.addLayerBelow(unclustered, "building");

    for (int i = 0; i < layers.length; i++) {
      CircleLayer circles = new CircleLayer("cluster-" + i, "earthquakes");
      circles.setProperties(
        circleColor(layers[i][1]),
        circleRadius(70f),
        circleBlur(1f)
      );
      Expression pointCount = toNumber(get("point_count"));
      circles.setFilter(
        i == 0
          ? Expression.gte(pointCount, literal(layers[i][0])) :
          Expression.all(
            Expression.gte(pointCount, literal(layers[i][0])),
            Expression.lt(pointCount, literal(layers[i - 1][0]))
          )
      );
      loadedMapStyle.addLayerBelow(circles, "building");
    }
  }

  @Override
  public void onResume() {
    super.onResume();
    mapView.onResume();
  }

  @Override
  protected void onStart() {
    super.onStart();
    mapView.onStart();
  }

  @Override
  protected void onStop() {
    super.onStop();
    mapView.onStop();
  }

  @Override
  public void onPause() {
    super.onPause();
    mapView.onPause();
  }

  @Override
  public void onLowMemory() {
    super.onLowMemory();
    mapView.onLowMemory();
  }

  @Override
  protected void onDestroy() {
    super.onDestroy();
    mapView.onDestroy();
  }

  @Override
  protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    mapView.onSaveInstanceState(outState);
  }
}
